Charlie and Bryan have the same amount of money.
Charlie spends $30 and Bryan spends $90.
In the end, Charlie has 7 times as much money as Bryan.
- How much does each of them have at first?
- How much does Bryan have less than Charlie in the end?
|
Charlie |
Bryan |
Before |
7 u + 30 |
1 u + 90 |
Change |
- 30 |
- 90 |
After |
7 u |
1 u |
(a)
At first
Amount that Charlie has = Amount that Bryan has
7 u + 30 = 1 u + 90
7 u - 1 u = 90 - 30
6 u = 60
1 u = 60 ÷ 6 = 10
Amount that each of them has at first
= 1 u + 90
= 10 + 90
= $100
(b)
Amount that Bryan has less than Charlie in the end
= 7 u - 1 u
= 6 u
= 6 x 10
= $60
Answer(s): (a) $100; (b) $60